William j



UNITED STATES PATENT OFFICE.

WILLIAM J. GILLESPIE, OF INDIANAPOLIS, INDIANA.

-lNCRUSTATlON-PREVENTIVE.

SPECIFICATION forming part of Letters Patent No. 239,242, dated March 22, 1881.

Application filed December 7, 1880. Specimens.)

To all whom it may concern:

Be it known that I, WILLIAM J. GILLEs- PIE, a citizen of the United States, residing at Indianapolis, in the county of Marion and State of Indiana, have invented a new and useful composition of matter to be used for the removal of scales in boilers, also preventing the scale from accumulating thereon, of which the following is a specification. IO

My composition consists of the following ingredients, combined in the proportions stated, viz: soda-ash, English, twenty-five pounds; linseed-oil cake, ground, four pounds; oak-bark, ground, three pounds; copperas, ground, two pounds; potato-starch, ground, two pounds; charcoal, ground, three pounds. These ingredients are to be thoroughly mingled by agitation. Thus, in mixing large quantities, the soda-ash is spread on a floor several inches deep. On this the linseed-oil cake, the oakbark, the copperas, the potato-starch, and charcoal are also spread, and the whole mass mixed, by stirring and turning them over, or in any other manner, so that they are, thoroughly mixed.

1n using the above-named composition about six or eight pounds are introduced into the boiler through the man-hole or safety-valve, and the boiler run for five or six days, (no longer.) Then blow off and clean out. Repeat the same dose and operation until the boiler is free from scale. The foregoing is when the boiler is already incrusted with lime-scale. After the boiler has been freed from the old scale, then from three to four pounds of the composition are introduced into the boiler each time the boiler is blown off. This will suffice to keep the lime from forming on the boiler or flues.

I am aware that the salts of iron and copper have been heretofore combined with alkaline salts and other substances for the purpose of removing incrustation in steam-boilers, and therefore this forms no part of my invention; but

What I claim as my improvement, and desire to secure by Letters Patent, is-

The composition of matter as herein de scribed, consistingofsoda-ash, linseed-oil cake, oak-bark, copperas, potatostarch, and charcoal, in the proportions specified, for the purposes set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

WILLIAM J. GILLES PIE.

Witnesses:

E. O. FRINK, G. H. BENNETT. 

